According to the Washington Post, Cuba and the United States have reached a deal to allow regular passenger flights between the two countries. However, you can't head online and book just yet.
The deal does not mean that Americans will be able to begin booking travel to Cuba immediately. But it would set in motion the safety inspections and other procedures required by the Federal Aviation Administration when such an agreement is reached. Experts say it will probably be three to six months before U.S.

If you are a registered member of the AAdvantage program, you might be able to earn 7,500 bonus American Airlines miles for test driving a Cadillac before December 31, 2015. Check your email to see if you received the following promotional offer that this FlyerTalker did:
Hello xxx,
AAdvantage Number: *******Cadillac shares your passion for travel.

Since 2010 (I think), Argentina has had an official exchange rate that was a complete fiction. You could not buy dollars at the official rate.

Until December 31, 2015, you can book American Airlines flights to Europe, Brazil, Argentina, or Chile for 16,000 ThankYou Points or Japan for 20,000 ThankYou Points each way with no fuel surcharges.

Etihad Guest's generous chart for American Airlines flights plus the current transfer bonus from ThankYou Points to Etihad miles combine for an unbeatable offer.

The Citi

Update: Below is my bonus offer. This is a targeted bonus, so yours may be different.

Through December 18, 2015, United is offering a 100% bonus on purchased miles. The size of the bonus depends on the number of miles you buy, with the largest 100% bonus kicking in at 30,000 miles purchased.

United miles normally cost 3.5 cents per mile plus a 7.5% tax, bringing the full price to 3.76 cents each.

I have a big Asia trip coming up in January.

First Class on the Etihad A380 is one of the nicest suites in the world, and I am looking forward to flying it next month.

United is releasing an unusual amount of award space to Europe for Summer 2016. A lot of flights have 9+ award seats in Business Class on the same flight. Book now before it disappears!

United award space can be searched on united.com, and the Saver award space can be booked with any Star Alliance miles.

Avianca LifeMiles and Passageiro de Primeira are offering a 150% bonus on purchased miles through December 15, 2015. The minimum purchase is only $66.

LifeMiles cost 3.3 cents each, so with a 150% bonus, you get the miles for 1.32 cents each. For instance, if you purchase 10,000 LifeMiles with a 15,000 mile bonus for 25,000 total miles, it would cost $330 or 1.32 cents each.